<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" @clear="getUserList" clearable>
            <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="userlist" border stripe>
          <el-table-column type="index" ></el-table-column>
          <el-table-column prop="username" label="姓名" ></el-table-column>
          <el-table-column prop="email" label="邮箱" ></el-table-column>
          <el-table-column prop="mobile" label="电话" ></el-table-column>
          <el-table-column prop="role_name" label="角色" ></el-table-column>
          <el-table-column label="状态" >
              <template slot-scope="scope">
                  <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)"></el-switch>
              </template>
          </el-table-column>
          <el-table-column label="操作" width="180px">
              <template slot-scope="scope">
                  <!-- 修改按钮 -->
                  <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                  <!-- 删除按钮 -->
                  <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                  <!-- 分配角色按钮 -->
                  <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                    <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                  </el-tooltip>
              </template>
          </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[2, 5, 7, 10]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加用户对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
      >
      <!-- 内容区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px" >
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户信息对话框 -->
    <el-dialog
      title="修改信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
      >
      <el-form ref="editFormRef" :model="editForm" label-width="70px" :rules="editFormRules" >
        <el-form-item label="用户名"> 
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机号" prop="mobile"> 
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="50%"
      @close="setRoleDialogClosed"
      >
      <div>
        <p>当前用户：{{userInfo.username}}</p>
        <p>当前角色：{{userInfo.role_name}}</p>
        <p>分配新角色：
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    // 自定义校验规则（邮箱、手机号）
      // var checkEmail = (_rule, value, cb) => {
      //   // 验证邮箱正则表达式
      //    const regEmail = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
      //    if (!value) {
      //     //  合法邮箱
      //      return cb()
      //    }
      //    cb(new Error('请输入合法的邮箱'))
      // }
      var checkMobile = (_rule, value, cb) => {
        // 验证手机号的正则表达式
        const regMobile = /^[1][3,4,5,7,8][0-9]{9}$/
        if (regMobile.test(value)) {
          return cb()
        }
        cb(new Error('请输入合法的手机号'))
      }
    return {
      // 获取用户列表的参数对象
      queryInfo: {
        // 搜索关键字
        query: '',
        // 当前页码
        pagenum: 1,
        // 每页显示条数
        pagesize: 2,
      },
      userlist: [],
      total: 0,
      // 控制添加用户对话框显示与隐藏
      addDialogVisible: false,
      // 控制修改用户信息对话框显示与隐藏
      editDialogVisible: false,
      // 控制分配角色对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {},
      // 所有角色的数据列表
      rolesList: [],
      // 选择器中已选中的角色id值
      selectedRoleId: '',
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加表单的验证规则对象  
      addFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' }
          // { validator: checkEmail, trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ]
      },
      // 查询到修改用户信息数据
      editForm: {},
      // 修改用户表单验证规则对象
      editFormRules: {
        email: [
          {required: true, message:'请输入用户邮箱', trigger: 'blur'}
        ],
        mobile: [
          {required: true, message:'请输入用户手机号码', trigger: 'blur'},
          {validator: checkMobile, trigger: 'blur'}
        ]

      }
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    // 获取用户列表信息
    async getUserList() {
      const { data: res } = await this.$http.get('users', {params: this.queryInfo})
      // console.log(res)
      if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
      }
      this.userlist = res.data.users
      this.total = res.data.total 
    },
    // 监听pagesize改变事件
    handleSizeChange(newSize) {
        console.log(newSize)
        this.queryInfo.pagesize = newSize
        this.getUserList()
    },
    // 监听pagenum改变的事件
    handleCurrentChange(newPage) {
       console.log(newPage)
        this.queryInfo.pagenum = newPage
        this.getUserList()
    },
    // 监听switch开关状态的改变
    async userStateChanged(userinfo) {
      console.log(userinfo) 
      const {data: res} = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
      if (res.meta.status !== 200) {
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
    },
    // 监听添加用户对话框的关闭事件
    addDialogClose() {
    // 重置整个添加用户表单数据 
      this.$refs.addFormRef.resetFields()
    },
    // 点击确定按钮，添加新用户
    addUser() {
      // 获取表单数据进行预校验
      this.$refs.addFormRef.validate(async vaild => {
        // console.log(vaild)
        // 预校验通过可以向后台发请数据请求
        if (!vaild) return 
        const {data: res} = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error(res.meta.msg)          
        }
        this.$message.success(res.meta.msg)
        // 隐藏添加用户对话框
        this.addDialogVisible = false
        // 重新获取用户列表
        this.getUserList()
      })
    },
    // 展示编辑用户的对话框
    async showEditDialog(id) {
      const {data: res} = await this.$http.get('users/' + id)
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 监听修改用户信息对话框关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    //  修改用户信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async vaild => {
        if (!vaild) return 
        const {data: res} = await this.$http.put('users/' + this.editForm.id, {email: this.editForm.email, mobile: this.editForm.mobile})
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        // 关闭对话框
        this.editDialogVisible = false
        // 重新刷新用户列表
        this.getUserList()
        // 提示修改信息成功
        this.$message.success(res.meta.msg)
      })
    },
    // 根据id删除用户信息
    async removeUserById(id) {
      // 弹框提示
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      // confirmResult接收的结果为字符串confirm则确认删除
      // confirmResult接收的结果为字符串cancel则取消删除
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const {data: res} = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getUserList()
    },
    // 展示分配角色的对话框
    async setRole(userInfo) {
      this.userInfo = userInfo
      // 在展示对话框前，获取所有权限的列表
      const {data: res} =  await this.$http.get('roles')
      if(res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
      this.setRoleDialogVisible = true
    },
    // 点击分配角色对话框的确定按钮事件
    async saveRoleInfo() {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色')
      }
      const {data: res} = await this.$http.put(`users/${this.userInfo.id}/role`, {rid: this.selectedRoleId})
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    // 监听分配角色对话框的关闭事件
    setRoleDialogClosed() {
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  }
}
</script>

<style lang="less" scoped>

</style>  